build: Remove unneeded as_bytes

Signed-off-by: Akira Moroo <[email protected]>

Author: retrage

src/efi/mod.rs

@@ -266,7 +266,7 @@ pub fn efi_exec(
     let wrapped_fs = file::FileSystemWrapper::new(fs, efi_part_id);
 
     let mut path = [0u8; 256];
-    path[0..crate::efi::EFI_BOOT_PATH.as_bytes().len()]
+    path[0..crate::efi::EFI_BOOT_PATH.len()]
         .copy_from_slice(crate::efi::EFI_BOOT_PATH.as_bytes());
     let device_path = DevicePath::File(path);
     let image = new_image_handle(